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Table 4 Working memory performance for ADHD subtypes and normal controls

From: Working memory deficits in adults with ADHD: is there evidence for subtype differences?

Measure        
  ADHD-CT (n = 17) ADHD-IA (n = 16) NC (n = 18)  
  M SE M SE M SE Post hoc comparisons with covariates
Arithmetic 11.65 0.58 11.75 0.60 13.39 0.56 ns
Digit Span 11.71 0.66 11.12 0.68 13.39 0.64 NC>ADHD-IA (p = .02)b
Letter-Number-Sequencing 11.65 0.69 11.31 0.71 14.33 0.67 NC>ADHD-CT, ADHD-IA (p = 0.03)
Spatial Span 11.59 1.02 11.00 0.42 11.94 0.53 ns
PASAT Averaged over ISIa (n = 16) (n = 14) (n = 17)  
Correct 31.66 2.17 31.64 2.33 38.81 2.11 ns
Omission Errors 15.33 1.97 15.59 2.10 8.22 1.91 NC<ADHD-CT (p = 0.008)
Longest Sequence 8.25 2.58 12.31 2.62 16.91 2.50 NC<ADHD-CT (p = 0.02)
  1. Note. NC = normal control, ADHD-IA = inattentive type, ADHD-CT = combined type.
  2. aIn some cases on the PASAT there were missing data due to technical problems in the computer recording responding. This included missing data for one ADHD-CT participant, two ADHD-IA participants, and one NC participant for PASAT measures only.
  3. bExploratory analyses